Hydrogen permeation properties of Pd-coated V_(89.8)Cr_(10)Y_(0.2) alloy membrane using WGS reaction gases

摘要

The influence of coexisting gases on the hydrogen permeation was studied through a Pd-coated V_(89.8)Cr_(10)Y_(0.2) alloy membrane. Preliminary hydrogen permeation experiments have been confirmed that hydrogen flux was 6.26 ml/min/cm~2 for a Pd-coated V_(89.8)Cr_(10)Y_(0.2) alloy membrane (thick: 0.5 mm) using pure hydrogen as feed gas. Also, the hydrogen permeation flux decreased with decrease of hydrogen partial pressure at constant pressure when H_2/CO_2 and H2/CO2/H2S mixture applied as feed gas respectively and permeation fluxes were satisfied with Sievert's law in different feed conditions. It was found from XRD and SEM results after permeation test that the Pd-coated V_(89.8)Cr_(10)Y_(0.2) alloy membrane had good stability and durability for various mixture feeding conditions.